[Jprogramming] Question about least squares with %.

[Gilles Kirouac]

 >>>> Could you please tell me what I would need to change to fix the
 >>>> following little J program (e.g., how to replace %. with a call
 >>>> to LAPACK)?

You should read

https://code.jsoftware.com/wiki/Vocabulary/LAPACK

~ Gilles

Le 2021-04-29 à 14:29, Henry Rich a écrit :
> %. does not use SVD.  It does do QR decomposition followed by inverse.
> 
> You can call LAPACK to perform the SVD, but you might need to delete 
> columns with low singular values.
> 
> Which routine you need to use depends on details of what you are going 
> to do.
> 
> Henry Rich
>